When playing any Legend of Zelda game, it is a specific type of obsessive-compulsive disorder in which the sufferer still must collect all common items such as Rupees, Recovery Hearts, Deku Seeds, Arrows, etc. despite already having the maximum carrying capacity of that item.

A typical Zelda OCD sufferer will feel anxious at the sight of a disappearing Green Rupee or Recovery Heart and make a mad run for it like a crackhead.